Internal error messages

Hey,

I am running the BBB with btsync and had it running for a while backuping a larger chunk of data. I was away and when I came back I saw the following messages. (line breaks a bit funny)

What are they supposed to mean? The BBB is still running and did probably not restart as the Putty session was still active when I saw the messages.

Thanks,
Tommi

root@beaglebone:/media/backup#
Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.009526] Internal error: : 1028 [#1] SMP THUMB2

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.090532] Process irq/70-44e0b000 (pid: 20, stack limit = 0xdf1862 40)

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.097521] Stack: (0xdf187f08 to 0xdf188000)

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.102154] 7f00: c036192d df186000 df175360 00000 001 df175340 df008840

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.110788] 7f20: c082d37c c007367b 00000000 c007355d df071db0 00000 000 df175340 c00735dd

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.119416] 7f40: 00000000 00000000 00000000 c0045103 fef30040 00000 000 ffffe020 df175340

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.128040] 7f60: 00000000 00000000 dead4ead ffffffff ffffffff df187 f74 df187f74 00000000

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.136665] 7f80: 00000000 dead4ead ffffffff ffffffff df187f90 df187 f90 00000000 df071db0

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.145290] 7fa0: c0045099 00000000 00000000 c000c8fd 00000000 00000 000 00000000 00000000

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.153916] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000 000 00000000 00000000

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.162545] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000 000 f3f38920 dd7f0000

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.197442] Code: 7849 fa01 f303 18d3 (8819) 6da0

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.229803] Internal error: Oops: 17 [#2] SMP THUMB2

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.309227] Process irq/70-44e0b000 (pid: 20, stack limit = 0xdf1862 40)

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.316219] Stack: (0xdf187d30 to 0xdf188000)

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.320850] 7d20: c007355d df0f6 4ec 00000000 c004323d

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.329475] 7d40: 00000000 d39fd39f 00000000 df0f6100 00000000 00000 00b c0831758 c00332e7

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.338101] 7d60: df187de3 00000020 df186000 00000001 c06e798c d39fd 39f c029d1c5 c0861db4

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.346723] 7d80: df186000 c08ab8d8 df186000 0000000b c0831758 00000 002 df187de3 00000020

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.355350] 7da0: 20000193 c000f819 df186240 0000000b 60000193 c0361 95a 00000000 00000004

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.363972] 7dc0: 37000000 20393438 31306166 30336620 38312033 28203 364 39313838 64362029

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.372596] 7de0: 00203061 00000000 00000000 c04c8a75 c06d98f4 df187 e14 c0821728 00001028

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.381208] 7e00: f9e0b02c df187ec0 c0832184 00000010 c082d37c 00000 000 00000000 c0008439

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.389829] 7e20: 00000000 c04cea9b 00000007 00000000 00000000 f9e0b 02c df0f6100 c0d35fc0

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.398449] 7e40: c0821fc0 df187e80 de68e440 de2b8900 00000000 df186 000 df186040 df187e70

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.407075] 7e60: c04ce7df c04ce7df c04cdb1c 80000033 df005ec0 00000 013 df186000 00000000

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.415696] 7e80: 00000013 c00351ff c0821728 c0073631 c0821fc0 c0821 fc0 132a623f 00009774

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.424331] 7ea0: c0821fc0 c0821fc0 0000467a c0361952 800000b3 fffff fff df187ef4 c04cea35

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.432957] 7ec0: 60000013 0000002c f9e0b000 f9e0b02c df141010 00000 065 60000013 00004000

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.441570] 7ee0: 00000010 c082d37c 00000000 00000000 00000000 df187 f08 c04ce809 c0361952

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.450198] 7f00: 800000b3 ffffffff c036192d df186000 df175360 00000 001 df175340 df008840

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.458821] 7f20: c082d37c c007367b 00000000 c007355d df071db0 00000 000 df175340 c00735dd

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.467448] 7f40: 00000000 00000000 00000000 c0045103 fef30040 00000 000 ffffe020 df175340

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.476075] 7f60: 00000000 00000000 dead4ead ffffffff ffffffff df187 f74 df187f74 00000001

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.484697] 7f80: 00010001 dead4ead ffffffff ffffffff df187f90 df187 f90 00000000 df071db0

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.493325] 7fa0: c0045099 00000000 00000000 c000c8fd 00000000 00000 000 00000000 00000000

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.501944] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000 000 00000000 00000000

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.510566] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000 000 f3f38920 dd7f0000

Message from syslogd@beaglebone at Dec 15 18:50:38 …
kernel:[166531.633341] Code: 4770 bf00 f8d0 3274 (f853) 0c20

Yeah, that’s an interesting one and immediately got my attention because there two kernel errors in your listing and no other indications. Both are thrown by the Power Reset Module (PRM) IRQ located at 44e0b000 on the L4_WKUP bus.

  1. Error 1028 - I have no idea what it is but my guess is there’s a bit mask 1024 | 4 somewhere that explains it.
  2. Oops 17 - This is an MMU page fault error indicating (again a big guess!) there is something wrong reading/writing a memory page.

I suspect a momentary blip (heat or EMI related maybe) that caused an L4_WKUP bus hiccup. OR, if you have been using this BBB for a long time the eMMC flash might be getting to end-of-life (which is accelerated in a hot environment.) If that is the case, you will see more and more MMU faults.

Ooops it did it again…trallalla

Just got exactly the same error again. only the numbers in the brackets [] are different, but I suspect this is system time or something.

So I guess there is nothing I can do?

Bought the beaglebone in summer, and have been playing with it since. For most of the time it has been lying on my desk without case or so, therefore I guess heat should not be an issue (also at nights it gets well below 20 C indoors these times!)

Yes, the time in the brackets is sec.usec since reboot. If the fault happens only once each night, and heat is not a problem, then I suspect there is a power glitch or something. Maybe you have a light or refrigerator or something near the BBB that goes on causing the fault. Make sure it’s isolated from other electronic devices.

Just in case anyone else runs into this, In my case I was getting this same messages and it turns out the system can’t access the PMIC on the I2C bus.

i2cdump -y -f 0 0x24

This command shows that it is not communicating properly with the PMIC. Now to figure out why…

Well, Is it marked with a "UU" then it's under the kernel control..

Regards,